542161 has 4 divisors (see below), whose sum is σ = 556852. Its totient is φ = 527472.

The previous prime is 542153. The next prime is 542167. The reversal of 542161 is 161245.

542161 = T₃₈ + T₃₉ + ... + T₁₄₈.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 78400 = 681^2 + 280^2 .

It is not a de Polignac number, because 542161 - 2³ = 542153 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (542167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7290 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (139213).

2⁵⁴²¹⁶¹ is an apocalyptic number.

It is an amenable number.

542161 is a deficient number, since it is larger than the sum of its proper divisors (14691).

542161 is a wasteful number, since it uses less digits than its factorization.

542161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14690.

The product of its digits is 240, while the sum is 19.

The square root of 542161 is about 736.3158289756. The cubic root of 542161 is about 81.5410108878.

It can be divided in two parts, 542 and 161, that added together give a triangular number (703 = T₃₇).

The spelling of 542161 in words is "five hundred forty-two thousand, one hundred sixty-one".